| M.L. & I. Co. O-2-7818 | KD Energy, LLC | Ganado (Shallow) | 1 | 37K | 98.3K | by Jan 1993 – May 2015 |
| Carrin M. Patman B O-2-9208 | Caskids Operating Company | Francitas, North | 1 | 36.9K | 22.7K | Aug 2008 – Apr 2015 |
| Westhoff & McCrory O-2-11044 | Cimarron Engineering, LLC | Mauritz, West (5400) | 1 | 36.8K | 0 | Mar 2015 – Aug 2026 |
| Catherine G-2-149024 | Cox & Perkins Exploration, Inc. | Lost Bridge (Yegua 10,700) | 1 | 36.5K | 998K | Mar 1994 – Jun 1999 |
| Schuech, Irma "B" O-2-8219 | Angel Operating LLC | West Ranch (Frio 6200) | 1 | 36.2K | 56K | Nov 1996 – Apr 2002 |
| Westhoff, A. E. O-2-8807 | Encon Services, Inc. | Westhoff Ranch | 2 | 36K | 27.9K | Aug 2003 – Nov 2004 |
| Kallus Oil Unit O-2-8725 | Sue-Ann Operating, L.C. | Ganado (F-16) | 1 | 35.9K | 24.4K | May 2002 – Apr 2003 |
| Hillman G-2-120172 | Cox & Perkins Exploration, Inc. | Bright Falcon (Yegua 9600) | 1 | 35.9K | 7.55M | by Jan 1993 – Oct 2004 |
| Heard, Jas. M. O-2-1035 | Drachen Oil Company | Mayo | 1 | 35.8K | 341 | by Jan 1993 – Jul 2026 |
| Toney, M. H., Mrs. O-2-3202 | Hilcorp Energy Company | West Ranch (Toney) | 5 | 35.7K | 58.5K | by Jan 1993 – Sep 2012 |
| Moody, W.L. Jr. O-2-7878 | Crest Petroleum, LLC | Carancahua Bay, N. (Victor Sand) | 1 | 35.7K | 261K | Jun 1993 – Nov 2011 |
| Thunderbird G-2-246671 | Sue-Ann Operating, L.C. | Big 12 (11,900) | 1 | 35.5K | 1.27M | Sep 2008 – Jul 2020 |
| West Ranch State Oil&gas Unit 1 O-2-8674 | Hilcorp Energy Company | West Ranch (Greta) | 1 | 35.5K | 70.4K | Jul 2001 – Jan 2019 |
| Schumaker G-2-160542 | Brayton Operating Corp. | El Torito (Yegua 9000) | 1 | 35.4K | 1.37M | Dec 1995 – Jul 1996 |
| McElveen, H. O. O-2-4717 | Osyka Permian, LLC | El Toro, SW. (6500) | 4 | 35.1K | 36.4K | by Jan 1993 – Mar 2012 |
| Planet Oil G-2-205074 | Statoil Oil & Gas LP | Francitas (Frio 8600) | 1 | 34.4K | 2.53M | Jun 2004 – Feb 2013 |
| Signal Hill G-2-194684 | Allegro Investments, Inc. | Big 12 (10,400) | 1 | 34.2K | 736K | Dec 2001 – Nov 2006 |
| Bennett, J. M. O-2-8225 | McGowan Working Partners, Inc. | La Salle, West (Frio 5800) | 1 | 34.2K | 56.3K | Oct 1996 – Oct 2001 |
| Strauss O-2-10226 | KD Energy, LLC | Maurbro (Patrick 5500) | 1 | 34.2K | 44.4K | Dec 2011 – Jan 2024 |
| Tittizer Unit G-2-273436 | Marquee Corporation | Toro Grande (8700 SD) | 1 | 34K | 1.85M | Jan 2014 – Jul 2018 |
| Scherffius O-2-896 | McGowan Working Partners, Inc. | Lolita (Other Zones) | 1 | 33.7K | 12.5K | Nov 2006 – Aug 2024 |
| Ross, A.T. O-2-5966 | Sue-Ann Operating, L.C. | Ganado (F-4-a Stringer) | 1 | 33.6K | 101K | by Jan 1993 – Jan 2002 |
| Bennett, J.M. "R" O-2-7709 | Engelke, R. H. | West Ranch (Frio 6200) | 1 | 33.3K | 27.1K | by Jan 1993 – Jul 1996 |
| Bonnot, Louise O-2-6760 | Sue-Ann Operating, L.C. | La Ward, North(patrick 5500) | 1 | 33.2K | 515K | by Jan 1993 – Jun 2002 |
| Webernick et al Gas Unit G-2-219620 | Sandel Operating Company | Brushy Creek (Wilcox Cons.) | 1 | 33.1K | 1.76M | Feb 2006 – Aug 2026 |
| Dorotik G. U. G-2-226805 | Magnum Producing, LP | Foss-Brown (Wilcox) | 1 | 32.7K | 1.16M | Mar 2007 – Feb 2013 |
| Wearden G-2-219217 | Sandel Operating Company | Brushy Creek (Wilcox Cons.) | 1 | 32.7K | 1.72M | Jan 2006 – Aug 2026 |
| M. L. & I. Co. O-2-3365 | Sue-Ann Operating, L.C. | Ganado, Deep (Lower 6650) | 2 | 32.4K | 44.6K | Oct 1993 – Jun 1996 |
| West Ranch State Oil & Gas UNIT1 O-2-10022 | Hilcorp Energy Company | West Ranch, S. (Frio 6840) | 1 | 32.2K | 29K | Oct 2011 – Mar 2015 |
| Hillman G-2-176507 | Cox & Perkins Exploration, Inc. | Bright Falcon (Yegua 9600) | 1 | 32.2K | 11.2M | Mar 2000 – Jan 2012 |
| Moody O-2-6295 | New Source Oil & Gas, LLC | Moody Ranch, South (10,000) | 1 | 31.8K | 123K | by Jan 1993 – Jul 2026 |
| Porche No. 1 Gas Unit G-2-151501 | Cox & Perkins Exploration, Inc. | Bright Falcon (Yegua 10,400) | 1 | 31.8K | 928K | Aug 1994 – Dec 2001 |
| L. A. Silliman O-2-12183 | KD Energy, LLC | Ganado (F- 3-A) | 1 | 31.7K | 5.96K | Jul 2021 – Aug 2026 |
| Kramer-Glaser O-2-7313 | Amend Energy Company | Little Kentucky (Frio 6630) | 1 | 31.7K | 9.47K | by Jan 1993 – Oct 1997 |
| Fehrenkamp, F. O-2-2632 | Black Draw Energy LLC | El Toro, South (5600) | 2 | 30.9K | 16.5K | by Jan 1993 – Mar 2026 |
| Tunison, F. V., NCT-1 O-2-4037 | Sue-Ann Operating, L.C. | Ganado (F- 3-C) | 2 | 30.6K | 80.7K | by Jan 1993 – Aug 2003 |
| Bennett, J.M. "R" O-2-8253 | Cibolo Energy Operating, Inc. | TW (41-a Stringer) | 1 | 30.6K | 26.6K | Feb 1997 – Nov 2002 |
| Ploeger, Dorothy G-2-170694 | Acock/Anaqua Operating Co., LP | Morales, N. (9250) | 1 | 30.5K | 1.29M | Aug 1998 – Nov 2008 |
| Novian, A. F. Gas Unit No. 1 G-2-114021 | Hilcorp Energy Company | Toro Grande (7700 Yegua) | 1 | 30.3K | 6.29M | by Jan 1993 – Mar 2000 |
| Williams G-2-224928 | Magnum Producing, LP | Morales, N. (9250) | 1 | 30.1K | 245K | Dec 2006 – Apr 2017 |
| Ross, A. T. O-2-8926 | KD Energy, LLC | Ganado (F- 3-H) | 1 | 30K | 94.4K | Nov 2003 – Jun 2026 |
| Drummond, J.H. O-2-10598 | Hilcorp Energy Company | West Ranch (6850) | 2 | 29.7K | 82K | May 2013 – Aug 2025 |
| Schuech Unit No. 4 O-2-7829 | Engelke, R. H. | TW (Frio 6990) | 1 | 29.6K | 58.3K | by Jan 1993 – Oct 1995 |
| AM G-3-144270 | Tag Operating Company, Inc. | Lost Fork (Yegua 6800) | 1 | 29.3K | 2.13M | by Jan 1993 – Oct 2009 |
| Hess O-2-12525 | Mamerow Energy Corp | Mayo (5758) | 1 | 29.1K | 0 | Feb 2023 – Aug 2026 |
| Hultquist, M. O-2-4672 | KD Energy, LLC | Ganado (F- 7-a Seg 2) | 1 | 28.9K | 93.1K | Apr 2005 – Jul 2026 |
| Weed G-2-218584 | Remora Operating, LLC | Weed (Lower Frio) | 1 | 28.9K | 1.02M | Aug 2005 – Aug 2020 |
| Tittizer G-2-277478 | Marquee Corporation | Toro Grande (9000 SD) | 1 | 28.8K | 2.78M | Mar 2015 – Apr 2026 |
| Brooking, G.T. O-2-7789 | Bull Operating, LLC | Swan Lake (6700 Upper) | 2 | 28.7K | 84.6K | by Jan 1993 – Jun 2024 |
| Copsey, Bertha O-2-4831 | Engelke, R. H. | Stewart | 3 | 28.6K | 8.12K | by Jan 1993 – Feb 2000 |